LXR linux/sound/soc/davinci/davinci-sffsdr.c

   1/*
   2 * ASoC driver for Lyrtech SFFSDR board.
   3 *
   4 * Author:      Hugo Villeneuve
   5 * Copyright (C) 2008 Lyrtech inc
   6 *
   7 * Based on ASoC driver for TI DAVINCI EVM platform, original copyright follow:
   8 * Copyright:   (C) 2007 MontaVista Software, Inc., <source@mvista.com>
   9 *
  10 * This program is free software; you can redistribute it and/or modify
  11 * it under the terms of the GNU General Public License version 2 as
  12 * published by the Free Software Foundation.
  13 */
  14
  15#include <linux/module.h>
  16#include <linux/moduleparam.h>
  17#include <linux/timer.h>
  18#include <linux/interrupt.h>
  19#include <linux/platform_device.h>
  20#include <linux/gpio.h>
  21#include <sound/core.h>
  22#include <sound/pcm.h>
  23#include <sound/soc.h>
  24
  25#include <asm/dma.h>
  26#include <asm/mach-types.h>
  27#ifdef CONFIG_SFFSDR_FPGA
  28#include <asm/plat-sffsdr/sffsdr-fpga.h>
  29#endif
  30
  31#include <mach/edma.h>
  32
  33#include "../codecs/pcm3008.h"
  34#include "davinci-pcm.h"
  35#include "davinci-i2s.h"
  36
  37/*
  38 * CLKX and CLKR are the inputs for the Sample Rate Generator.
  39 * FSX and FSR are outputs, driven by the sample Rate Generator.
  40 */
  41#define AUDIO_FORMAT (SND_SOC_DAIFMT_DSP_B |    \
  42                      SND_SOC_DAIFMT_CBM_CFS |  \
  43                      SND_SOC_DAIFMT_IB_NF)
  44
  45static int sffsdr_hw_params(struct snd_pcm_substream *substream,
  46                            struct snd_pcm_hw_params *params)
  47{
  48        struct snd_soc_pcm_runtime *rtd = substream->private_data;
  49        struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  50        int fs;
  51        int ret = 0;
  52
  53        /* Fsref can be 32000, 44100 or 48000. */
  54        fs = params_rate(params);
  55
  56#ifndef CONFIG_SFFSDR_FPGA
  57        /* Without the FPGA module, the Fs is fixed at 44100 Hz */
  58        if (fs != 44100) {
  59                pr_debug("warning: only 44.1 kHz is supported without SFFSDR FPGA module\n");
  60                return -EINVAL;
  61        }
  62#endif
  63
  64        /* set cpu DAI configuration */
  65        ret = snd_soc_dai_set_fmt(cpu_dai, AUDIO_FORMAT);
  66        if (ret < 0)
  67                return ret;
  68
  69        pr_debug("sffsdr_hw_params: rate = %d Hz\n", fs);
  70
  71#ifndef CONFIG_SFFSDR_FPGA
  72        return 0;
  73#else
  74        return sffsdr_fpga_set_codec_fs(fs);
  75#endif
  76}
  77
  78static struct snd_soc_ops sffsdr_ops = {
  79        .hw_params = sffsdr_hw_params,
  80};
  81
  82/* davinci-sffsdr digital audio interface glue - connects codec <--> CPU */
  83static struct snd_soc_dai_link sffsdr_dai = {
  84        .name = "PCM3008", /* Codec name */
  85        .stream_name = "PCM3008 HiFi",
  86        .cpu_dai_name = "davinci-mcbsp",
  87        .codec_dai_name = "pcm3008-hifi",
  88        .codec_name = "pcm3008-codec",
  89        .platform_name = "davinci-mcbsp",
  90        .ops = &sffsdr_ops,
  91};
  92
  93/* davinci-sffsdr audio machine driver */
  94static struct snd_soc_card snd_soc_sffsdr = {
  95        .name = "DaVinci SFFSDR",
  96        .owner = THIS_MODULE,
  97        .dai_link = &sffsdr_dai,
  98        .num_links = 1,
  99};
 100
 101/* sffsdr audio private data */
 102static struct pcm3008_setup_data sffsdr_pcm3008_setup = {
 103        .dem0_pin = GPIO(45),
 104        .dem1_pin = GPIO(46),
 105        .pdad_pin = GPIO(47),
 106        .pdda_pin = GPIO(38),
 107};
 108
 109struct platform_device pcm3008_codec = {
 110                .name = "pcm3008-codec",
 111                .id = 0,
 112                .dev = {
 113                                .platform_data = &sffsdr_pcm3008_setup,
 114                },
 115};
 116
 117static struct resource sffsdr_snd_resources[] = {
 118        {
 119                .start = DAVINCI_MCBSP_BASE,
 120                .end = DAVINCI_MCBSP_BASE + SZ_8K - 1,
 121                .flags = IORESOURCE_MEM,
 122        },
 123};
 124
 125static struct evm_snd_platform_data sffsdr_snd_data = {
 126        .tx_dma_ch      = DAVINCI_DMA_MCBSP_TX,
 127        .rx_dma_ch      = DAVINCI_DMA_MCBSP_RX,
 128};
 129
 130static struct platform_device *sffsdr_snd_device;
 131
 132static int __init sffsdr_init(void)
 133{
 134        int ret;
 135
 136        if (!machine_is_sffsdr())
 137                return -EINVAL;
 138
 139        platform_device_register(&pcm3008_codec);
 140
 141        sffsdr_snd_device = platform_device_alloc("soc-audio", 0);
 142        if (!sffsdr_snd_device) {
 143                printk(KERN_ERR "platform device allocation failed\n");
 144                return -ENOMEM;
 145        }
 146
 147        platform_set_drvdata(sffsdr_snd_device, &snd_soc_sffsdr);
 148        platform_device_add_data(sffsdr_snd_device, &sffsdr_snd_data,
 149                                 sizeof(sffsdr_snd_data));
 150
 151        ret = platform_device_add_resources(sffsdr_snd_device,
 152                                            sffsdr_snd_resources,
 153                                            ARRAY_SIZE(sffsdr_snd_resources));
 154        if (ret) {
 155                printk(KERN_ERR "platform device add resources failed\n");
 156                goto error;
 157        }
 158
 159        ret = platform_device_add(sffsdr_snd_device);
 160        if (ret)
 161                goto error;
 162
 163        return ret;
 164
 165error:
 166        platform_device_put(sffsdr_snd_device);
 167        return ret;
 168}
 169
 170static void __exit sffsdr_exit(void)
 171{
 172        platform_device_unregister(sffsdr_snd_device);
 173        platform_device_unregister(&pcm3008_codec);
 174}
 175
 176module_init(sffsdr_init);
 177module_exit(sffsdr_exit);
 178
 179MODULE_AUTHOR("Hugo Villeneuve");
 180MODULE_DESCRIPTION("Lyrtech SFFSDR ASoC driver");
 181MODULE_LICENSE("GPL");
 182